EP0961648A1 - Method for producing a filter bottom for water treatment - Google Patents

Method for producing a filter bottom for water treatment

Info

Publication number
EP0961648A1
EP0961648A1 EP98904230A EP98904230A EP0961648A1 EP 0961648 A1 EP0961648 A1 EP 0961648A1 EP 98904230 A EP98904230 A EP 98904230A EP 98904230 A EP98904230 A EP 98904230A EP 0961648 A1 EP0961648 A1 EP 0961648A1
Authority
EP
European Patent Office
Prior art keywords
formwork
filter
slab
lost
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98904230A
Other languages
German (de)
French (fr)
Other versions
EP0961648B1 (en
Inventor
Didier Perrin
Alain Motte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suez International SAS
Original Assignee
Degremont SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Degremont SA filed Critical Degremont SA
Publication of EP0961648A1 publication Critical patent/EP0961648A1/en
Application granted granted Critical
Publication of EP0961648B1 publication Critical patent/EP0961648B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/22—Downward filtration, the filter material being supported by pervious surfaces

Definitions

  • the present invention relates to a process for producing filter floors for water treatment and more particularly to draining filter floors with strainers or nozzles, supporting the filtering material.
  • filters in particular filters with granular filtering material
  • the structure of which, generally made of reinforced concrete mainly comprises a casing comprising a slab supported on peripheral walls, and a perforated floor supporting the filter material.
  • these filter floors have a structure, consisting of beams or posts, which supports a monolithic slab or a set of prefabricated slabs.
  • FR-A- 2 596 385 discloses a process consisting in assembling slabs or plates of small prefabricated dimensions, put in place, connected and fixed to the beams or posts of the support structure by means of a system of appropriate anchorage.
  • EP-A-0 324 673 describes a process which consists in pouring a reinforced concrete slab on a lost formwork previously placed on the beams or posts constituting the support structure of the filter floor.
  • the present invention proposes to provide a method for producing a concrete filter floor making it possible to reduce the implementation times and therefore the cost prices. Consequently, the subject of this invention is a process for producing a filter floor for water treatment comprising a structure consisting of beams or posts supporting a slab provided with a plurality of orifices intended to receive strainers, characterized in what is done by pouring the concrete of said structure and of the slab directly into the casing of the filter, the conformation of said structure and of the lower part of the slab being obtained by a single and unique lost formwork model.
  • the method according to the invention comprises the following successive steps:
  • the casting of the support structure and the slab can be carried out either in a single step, or in two steps.
  • the invention also relates to a lost formwork for the implementation of the method as defined above as well as a filter for the treatment of water comprising a concrete floor produced in accordance with this process and using a lost formwork as specified above.
  • FIG. 1 schematically illustrates the implementation of the method of the present invention according to a first embodiment
  • Figure 2 is a schematic view similar to Figure 1 illustrating a second embodiment
  • FIG. 3 is a partial plan view of an embodiment of a lost formwork used in the process which is the subject of the invention
  • FIGS. 4 and 5 are respectively sections according to IV-IV and V-V of FIG. 3 and,
  • FIGS. 6 and 7 illustrate a variant of the invention respectively in partial view in vertical section and in a view along F of FIG. 6.
  • FIG. 1 refers to the production of a filter floor in which the collection and / or distribution of the fluids is ensured by a channel 2 located under the filter floor.
  • the casing of the filter which is constituted in known manner by a raft resting on peripheral side walls.
  • the water distribution and / or collection channel 2 is covered with slabs such as 3 which provide support for the forms 4 according to the invention and which allow the passage of water.
  • a blower manifold 5 is also provided ensuring the distribution under the filter floor of the air necessary for the process.
  • reinforcements 6 are put in place intended to mechanically secure the floor to the casing.
  • the lost formwork 4 is then placed, which is fixed on the casing.
  • This formwork made of plastic, steel or composite material (resin plus glass fibers, concrete, glass fibers) has a thickness which varies according to the material, its embodiment, its width and its height. Preferably, this thickness is between 1 and 15 mm, for example between 3 and 7 mm. Its height is chosen according to the desired speed of the fluid under the filter floor (the choice of a suitable speed allows a good even distribution over all the strainers of the same floor) and the desired accessibility . This height is between 100 and 700 mm, preferably between 120 and 250 mm.
  • the width of the formwork as 4 is determined according to the mechanical characteristics of the material used for the realization of this formwork, its cost and its method of manufacture. According to the invention, this width is between 300 and 1,300 mm, preferably between 450 and 700 mm.
  • the length of the formwork can be for example between 2 and 7 meters.
  • FIG. 6 and 7 of the accompanying drawings illustrate an alternative embodiment of the formwork according to the invention.
  • the air is distributed under the filter floor through orifices such as 13 and the water is distributed and / or collected by orifices such as 14.
  • the orifices 13 and 14 are produced during the manufacture of the formwork as seen in these figures.
  • An orifice of large cross section, of adequate geometry is produced during the shuttering of the wall of the filter, this orifice making it possible to connect the channel 2 to the shuttering 4.
  • a sealing 18 is then carried out using an appropriate material.
  • the mode of implementation of the method of the invention for producing the filter floor using lost formwork such as 4 is identical to that described above with reference to FIG. 1.
  • the form of the formwork 4 is chosen so as to obtain maximum rigidity in the horizontal and vertical planes of this formwork.
  • the formwork 4 has for this purpose ribs such as
  • the form of the formwork 4 is defined so that the pressures exerted on its side walls by the concrete during its pouring, create a counter-deflection in the upper part of the formwork to partially compensate for the deflection due to the weight of the concrete.
  • This particular geometry makes it possible to optimize the thickness of the formwork.
  • the fixing of the lost formwork such as 4 is carried out by any appropriate means, the formwork 4 being provided for this purpose with fixing holes such as 17 allowing it to be joined to the raft of the filter.
  • the seal between the formwork 4 and the slab, or the walls of the filter, is ensured by an appropriate seal.
  • Each formwork 4 also comprises, in its upper part, orifices intended to receive rings on which the strainers or nozzles of the filter floor are fixed.
  • FIG. 2 differs from the embodiment of FIG. 1 only in that the air distribution and the collection and / or distribution of the water are ensured by a channel 12 which is outside the casing 1 of the filter.
  • the air is distributed under the filter floor through orifices such as 13 and the water is distributed and / or collected by orifices such as 14.
  • the mode of implementation of the method of The invention for producing the filter floor using lost formwork such as 4 is identical to that described above with reference to FIG. 1.

Landscapes

  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Filtering Materials (AREA)
  • Physical Water Treatments (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Water Treatment By Sorption (AREA)
  • Housing For Livestock And Birds (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Sewage (AREA)

Abstract

The invention concerns a method for making a filter bottom for water treatment comprising a structure (10) consisting of beams or posts supporting a slab (9) provided with a plurality of openings for receiving screen water filters (11). The invention is characterised in that it consists in carrying out the concreting of said structure and slab directly in the filter casing, the shaping of said structure and the lower part of the slab resulting from one and only permanent form model (4).

Description

« Procédé de réalisation d'un plancher de filtre pour le traitement des eaux » "Method for producing a filter floor for water treatment"
La présente invention concerne un procédé de réalisation de planchers de filtre pour le traitement des eaux et plus particulièrement de planchers de filtre drainant à crépines ou buselures, supportant le matériau filtrant.The present invention relates to a process for producing filter floors for water treatment and more particularly to draining filter floors with strainers or nozzles, supporting the filtering material.
On sait que certaines opérations de filtration dans le domaine du traitement de l'eau sont réalisées sur des filtres, notamment des filtres à matériau filtrant granulaire, dont la structure, généralement en béton armé comporte principalement un cuvelage comprenant un radier s'appuyant sur des parois périphériques, et un plancher perforé supportant le matériau filtrant.It is known that certain filtration operations in the field of water treatment are carried out on filters, in particular filters with granular filtering material, the structure of which, generally made of reinforced concrete mainly comprises a casing comprising a slab supported on peripheral walls, and a perforated floor supporting the filter material.
Les fonctions de tels planchers sont bien connues des spécialistes. Elles sont, outre de supporter le matériau filtrant, d'assurer le passage et l'écoulement du liquide, notamment de l'eau filtrée par ledit matériau durant la phase de filtration ainsi que le passage et la répartition des fluides durant la phase de lavage.The functions of such floors are well known to specialists. They are, in addition to supporting the filtering material, to ensure the passage and the flow of the liquid, in particular of the water filtered by said material during the filtration phase as well as the passage and distribution of the fluids during the washing phase .
D'une manière générale, ces planchers de filtres comportent une structure, constituée de poutres ou de poteaux, qui supporte une dalle monolithique ou un ensemble de dalles préfabriquées.In general, these filter floors have a structure, consisting of beams or posts, which supports a monolithic slab or a set of prefabricated slabs.
En ce qui concerne la réalisation de la structure de support du plancher, il existe diverses possibilités notamment :With regard to the realization of the support structure of the floor, there are various possibilities in particular:
- le coulage de poutres ou de poteaux en béton dans le cuvelage des filtres ;- pouring concrete beams or posts into the filter casing;
- la pose de poutres ou de poteaux préfabriqués, dans le cuvelage des filttres.- the installation of prefabricated beams or posts, in the casing of the filters.
II existe également diverses techniques permettant de réaliser la partie supérieure du plancher. Ainsi, FR-A- 2 596 385 fait connaître un procédé consistant à assembler des dalles ou plaques de petites dimensions préfabriquées, mises en place, reliées et fixées aux poutres ou poteaux de la structure de support par l'intermédiaire d'un système d'ancrage approprié.There are also various techniques for making the upper part of the floor. Thus, FR-A- 2 596 385 discloses a process consisting in assembling slabs or plates of small prefabricated dimensions, put in place, connected and fixed to the beams or posts of the support structure by means of a system of appropriate anchorage.
EP-A-0 324 673 décrit un procédé qui consiste à couler une dalle de béton armé sur un coffrage perdu mis en place préalablement sur les poutres ou poteaux constituant la structure de support du plancher de filtre.EP-A-0 324 673 describes a process which consists in pouring a reinforced concrete slab on a lost formwork previously placed on the beams or posts constituting the support structure of the filter floor.
Il existe également des techniques de coulage du béton en une seule phase, de l'ensemble structure de support-dalle monolithique mais cette technique fait appel à l'utilisation de plusieurs types de coffrages perdus pour la réalisation respectivement des poutres ou poteaux et de la dalle.There are also techniques for pouring concrete in a single phase, of the whole support structure-monolithic slab, but this technique calls for the use of several types of lost formwork for the production of beams or columns and of the slab.
Ces techniques connues présentent un certain nombre d'inconvénients. En effet, elles font appel :These known techniques have a certain number of drawbacks. In fact, they call on:
- soit à l'assemblage de nombreux éléments préfabriqués (dalles, tiges, boulons, joints d'étanchéité...) dont la mise en oeuvre est délicate, longue et coûteuse ;- or the assembly of many prefabricated elements (slabs, rods, bolts, seals ...) whose implementation is delicate, long and expensive;
- soit à la mise en oeuvre des poutres, puis de prédalles ou de coffrages perdus posés sur les poutres et enfin au coulage d'une dalle en béton dont la mise en oeuvre de l'ensemble s'avère être délicate et coûteuse ;- either to the implementation of beams, then of pre-slabs or lost formwork placed on the beams and finally to the pouring of a concrete slab whose implementation of the assembly turns out to be delicate and costly;
- soit à l'assemblage de plusieurs types de coffrages perdus pour la réalisation de l'ensemble structure de support-dalle, cette technique se caratérisant également par une mise en oeuvre délicate et coûteuse.- Or the assembly of several types of lost formwork for the production of the support structure-slab assembly, this technique also being characterized by a delicate and costly implementation.
Afin de pallier les inconvénients des techniques antérieures rappelées ci-dessus, la présente invention se propose d'apporter un procédé de réalisation d'un plancher de filtre en béton permettant de réduire les temps de mise en oeuvre et donc les prix de revient. En conséquence, cette invention a pour objet un procédé de réalisation d'un plancher de filtre pour le traitement des eaux comportant une structure constituée de poutres ou de poteaux supportant une dalle pourvue d'une pluralité d'orifices destinés à recevoir des crépines caractérisé en ce que l'on réalise le coulage du béton de ladite structure et de la dalle directement dans le cuvelage du filtre, la conformation de ladite structure et de la partie inférieure de la dalle étant obtenue par un seul et unique modèle de coffrage perdu .In order to overcome the drawbacks of the prior techniques mentioned above, the present invention proposes to provide a method for producing a concrete filter floor making it possible to reduce the implementation times and therefore the cost prices. Consequently, the subject of this invention is a process for producing a filter floor for water treatment comprising a structure consisting of beams or posts supporting a slab provided with a plurality of orifices intended to receive strainers, characterized in what is done by pouring the concrete of said structure and of the slab directly into the casing of the filter, the conformation of said structure and of the lower part of the slab being obtained by a single and unique lost formwork model.
Le procédé selon l'invention comporte les étapes successives suivantes:The method according to the invention comprises the following successive steps:
- réalisation du cuvelage du filtre,- realization of the filter casing,
- mise en place des ferraillages des poutres ou poteaux de la structure de support du filtre ;- installation of reinforcement of beams or columns of the filter support structure;
- positionnement et fixation des coffrages perdus ;- positioning and fixing of lost formwork;
- montage de bagues protégées par des capuchons, sur les coffrages perdus aux emplacements prévus pour les crépines ;- mounting of rings protected by caps, on the lost formwork in the locations provided for the strainers;
- réalisation du ferraillagede la partie supérieure de la dalle ;- realization of the reinforcement of the upper part of the slab;
- coulage du béton pour réaliser la structure de support et la dalle ,- pouring concrete to make the support structure and the slab,
- enlèvement des capuchons protégeant les bagues et montage des crépines sur lesdites bagues.- Removal of the caps protecting the rings and mounting of the strainers on said rings.
Selon l'invention, le coulage de la structure de support et de la dalle peut être réalisé soit en une seule étape, soit en deux étapes.According to the invention, the casting of the support structure and the slab can be carried out either in a single step, or in two steps.
L'invention vise également un coffrage perdu pour la mise en oeuvre du procédé tel que défini ci-dessus ainsi qu'un filtre pour le traitement des eaux comportant un plancher en béton réalisé conformément à ce procédé et en mettant en oeuvre un coffrage perdu tel que spécifié ci-dessus.The invention also relates to a lost formwork for the implementation of the method as defined above as well as a filter for the treatment of water comprising a concrete floor produced in accordance with this process and using a lost formwork as specified above.
D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent des exemples de réalisation dépourvus de tout caractère limitatif.Other characteristics and advantages of the present invention will emerge from the description given below with reference to the appended drawings which illustrate exemplary embodiments thereof without any limiting character.
Sur ces dessins :In these drawings:
- La figure 1 illustre de façon schématique la mise en oeuvre du procédé objet de la présente invention selon un premier exemple de réalisation ;- Figure 1 schematically illustrates the implementation of the method of the present invention according to a first embodiment;
- La figure 2 est une vue schématique similaire à la figure 1 illustrant un second exemple de réalisation ;- Figure 2 is a schematic view similar to Figure 1 illustrating a second embodiment;
- La figure 3 est une vue partielle en plan d'un exemple de réalisation d'un coffrage perdu mis en oeuvre dans le procédé objet de l'invention,FIG. 3 is a partial plan view of an embodiment of a lost formwork used in the process which is the subject of the invention,
- Les figures 4 et 5 sont respectivement des coupes selon IV-IV et V-V de la figure 3 et,FIGS. 4 and 5 are respectively sections according to IV-IV and V-V of FIG. 3 and,
- Les figures 6 et 7 illustrent une variante de l'invention respectivement en vue partielle en coupe verticale et en une vue selon F de la figure 6.FIGS. 6 and 7 illustrate a variant of the invention respectively in partial view in vertical section and in a view along F of FIG. 6.
On se réfère en premier lieu à la figure 1 qui se réfère à la réalisation d'un plancher de filtre dans lequel la collecte et/ou la distribution des fluides est assurée par un canal 2 situé sous le plancher du filtre. Sur cette figure 1 on a désigné par la référence 1 le cuvelage du filtre qui est constitué de façon connu par un radier s'appuyant sur des parois latérales périphériques. Le canal de distribution et/ou de collecte des eaux 2 est recouvert de dalles telles que 3 qui assurent le support des coffrages 4 selon l'invention et qui permettent le passage de l'eau. On prévoit également un collecteur 5 de soufflerie assurant la distribution sous le plancher de filtre de l'air nécessaire au procédé. Selon la présente invention, après la réalisation du cuvelage 1 du filtre, on met en place des ferraillages 6 destinés à assurer la solidarisation mécanique du plancher avec le cuvelage. On pose ensuite les coffrages perdus 4 que l'on fixe sur le cuvelage.Reference is firstly made to FIG. 1 which refers to the production of a filter floor in which the collection and / or distribution of the fluids is ensured by a channel 2 located under the filter floor. In this figure 1 is designated by the reference 1 the casing of the filter which is constituted in known manner by a raft resting on peripheral side walls. The water distribution and / or collection channel 2 is covered with slabs such as 3 which provide support for the forms 4 according to the invention and which allow the passage of water. A blower manifold 5 is also provided ensuring the distribution under the filter floor of the air necessary for the process. According to the present invention, after the casing 1 of the filter has been produced, reinforcements 6 are put in place intended to mechanically secure the floor to the casing. The lost formwork 4 is then placed, which is fixed on the casing.
On a représenté sur les figures 3 et 4 un exemple de réalisation d'un type unique de coffrage utilisé dans le procédé objet de l'invention. Ce coffrage réalisé en matière plastique, en acier ou en matériau composite (résine plus fibres de verre, béton, fibres de verre) présentent une épaisseur qui varie en fonction du matériau, de son mode de réalisation, de sa largeur et de sa hauteur. De préférence, cette épaisseur est comprise en 1 et 15 mm, par exemple entre 3 et 7 mm. Sa hauteur est choisie en fonction de la vitesse désirée du fluide sous le plancher de filtre (le choix d'une vitesse adaptée permet d'obtenir une bonne équirépartition sur l'ensemble des crépines d'un même plancher) et de l'accessibilité souhaitée. Cette hauteur est comprise entre 100 et 700 mm, de préférence entre 120 et 250 mm. La largeur du coffrage tel que 4 est déterminée en fonction des caractéristiques mécaniques du matériau utilisé pour la réalisation de ce coffrage, de son coût et de son mode de fabrication. Selon l'invention, cette largeur est comprise entre 300 et 1 300 mm, de préférence entre 450 et 700 mm. La longueur du coffrage peut être comprise par exemple entre 2 et 7 mètres.There is shown in Figures 3 and 4 an embodiment of a single type of formwork used in the method of the invention. This formwork made of plastic, steel or composite material (resin plus glass fibers, concrete, glass fibers) has a thickness which varies according to the material, its embodiment, its width and its height. Preferably, this thickness is between 1 and 15 mm, for example between 3 and 7 mm. Its height is chosen according to the desired speed of the fluid under the filter floor (the choice of a suitable speed allows a good even distribution over all the strainers of the same floor) and the desired accessibility . This height is between 100 and 700 mm, preferably between 120 and 250 mm. The width of the formwork as 4 is determined according to the mechanical characteristics of the material used for the realization of this formwork, its cost and its method of manufacture. According to the invention, this width is between 300 and 1,300 mm, preferably between 450 and 700 mm. The length of the formwork can be for example between 2 and 7 meters.
On se réfère aux figures 6 et 7 des dessins annexés qui illustrent une variante de réalisation du coffrage selon l'invention. Dans cette variante, l'air est distribué sous le plancher de filtre par des orifices tels que 13 et l'eau est distribuée et/ou collectée par des orifices tels que 14. Les orifices 13 et 14 sont réalisés lors de la fabrication du coffrage comme on le voit sur ces figures. Un orifice de grande section, d'une géométrie adéquate est réalisé lors du coffrage de la paroi du filtre, cet orifice permettant de relier le canal 2 au coffrage 4. Un scellement 18 est ensuite effectué à l'aide d'un matériau approprié. Par ailleurs, le mode de mise en oeuvre du procédé de l'invention pour réaliser le plancher de filtre à l'aide des coffrages perdus tels que 4 est identique à celui décrit ci-dessus en référence à la figure 1. La forme du coffrage 4 est choisie de manière à obtenir une rigidité maximale dans les plans horizontaux et verticaux de ce coffrage. Dans l'exemple de réalisation illustré sur les dessins, le coffrage 4 comporte dans ce but, des nervures telles queReferring to Figures 6 and 7 of the accompanying drawings which illustrate an alternative embodiment of the formwork according to the invention. In this variant, the air is distributed under the filter floor through orifices such as 13 and the water is distributed and / or collected by orifices such as 14. The orifices 13 and 14 are produced during the manufacture of the formwork as seen in these figures. An orifice of large cross section, of adequate geometry is produced during the shuttering of the wall of the filter, this orifice making it possible to connect the channel 2 to the shuttering 4. A sealing 18 is then carried out using an appropriate material. Furthermore, the mode of implementation of the method of the invention for producing the filter floor using lost formwork such as 4 is identical to that described above with reference to FIG. 1. The form of the formwork 4 is chosen so as to obtain maximum rigidity in the horizontal and vertical planes of this formwork. In the embodiment illustrated in the drawings, the formwork 4 has for this purpose ribs such as
15 et 15'. Leur forme est étudiée de manière à réduire au maximum les pertes de charge créées par les parois du coffrage. Dans ce but, on privilégie, selon l'invention, des géométries à forte courbure en particulier sur les parois latérales du coffrage.15 and 15 '. Their shape is studied so as to minimize the pressure losses created by the walls of the formwork. For this purpose, preference is given, according to the invention, to geometries with a large curvature, in particular on the side walls of the formwork.
Par ailleurs, la forme du coffrage 4 est définie de manière que les pressions exercées sur ses parois latérales par le béton lors de son coulage, créent une contre flèche en partie supérieure du coffrage pour compenser partiellement la flèche due au poids du béton. Cette géométrie particulière permet d'optimiser l'épaisseur du coffrage.Furthermore, the form of the formwork 4 is defined so that the pressures exerted on its side walls by the concrete during its pouring, create a counter-deflection in the upper part of the formwork to partially compensate for the deflection due to the weight of the concrete. This particular geometry makes it possible to optimize the thickness of the formwork.
La fixation des coffrages perdus tels que 4 s'effectue par tout moyen approprié, le coffrage 4 étant muni à cet effet de trous de fixation tels que 17 permettant sa solidarisation avec le radier du filtre. L'étanchéité entre le coffrage 4 et le radier, ou les parois du filtre, est assurée par un joint approprié. Chaque coffrage 4 comporte par ailleurs, en sa partie supérieure, des orifices destinés à recevoir des bagues sur lesquelles viennent se fixer les crépines ou buselures du plancher de filtre.The fixing of the lost formwork such as 4 is carried out by any appropriate means, the formwork 4 being provided for this purpose with fixing holes such as 17 allowing it to be joined to the raft of the filter. The seal between the formwork 4 and the slab, or the walls of the filter, is ensured by an appropriate seal. Each formwork 4 also comprises, in its upper part, orifices intended to receive rings on which the strainers or nozzles of the filter floor are fixed.
Après la fixation des coffrages perdus tels que 4 sur le radier du filtre, on met en place les bagues telles que 7, munies de capuchons de protection, dans les orificesAfter fixing the lost forms such as 4 on the raft of the filter, the rings such as 7, fitted with protective caps, are put in place in the orifices
16 prévus à cet effet sur la paroi supérieure des coffrages perdus 4.16 provided for this purpose on the upper wall of the lost formwork 4.
On met ensuite en place les ferraillages 8 destinés à assurer la tenue de la dalle 9 qui sera coulée ensuite dans le coffrage 4 et l'on réalise les poutres 10 de la structure de support ainsi que la dalle 9 du plancher de filtre, par coulage du béton en une ou deux étapes.We then put in place the reinforcements 8 intended to ensure the holding of the slab 9 which will then be cast in the formwork 4 and the beams 10 of the support structure are produced as well as the slab 9 of the filter floor, by pouring concrete in one or two steps.
Dès que le béton est sec on enlève les capuchons protégeant les bagues 7 et les crépines 11 sont montées sur les bagues 7. Le plancher de filtre est alors terminé. L'exemple de réalisation illustré par la figure 2 ne diffère du mode d'exécution de la figure 1 que par le fait que la distribution d'air et la collecte et/ou la distribution de l'eau sont assurées par un canal 12 qui est extérieur au cuvelage 1 du filtre. Dans cette variante, l'air est distribué sous le plancher de filtre par des orifices tels que 13 et l'eau est distribuée et/ou collectée par des orifices tels que 14. Par ailleurs, le mode de mise en oeuvre du procédé de l'invention pour réaliser le plancher de filtre à l'aide des coffrages perdus tels que 4 est identique à celui décrit ci-dessus en référence à la figure 1.As soon as the concrete is dry, the caps protecting the rings 7 are removed and the strainers 11 are mounted on the rings 7. The filter floor is then finished. The embodiment illustrated in FIG. 2 differs from the embodiment of FIG. 1 only in that the air distribution and the collection and / or distribution of the water are ensured by a channel 12 which is outside the casing 1 of the filter. In this variant, the air is distributed under the filter floor through orifices such as 13 and the water is distributed and / or collected by orifices such as 14. Furthermore, the mode of implementation of the method of The invention for producing the filter floor using lost formwork such as 4 is identical to that described above with reference to FIG. 1.
II demeure bien entendu que la présente invention n'est pas limitée aux exemples de réalisation décrits et/ou représentés mais qu'elle en englobe toutes les variantes qui entrent dans le cadre de la portée des revendications annexées. It remains to be understood that the present invention is not limited to the embodiments described and / or shown but that it encompasses all the variants which fall within the scope of the appended claims.

Claims

REVENDICATIONS
1 - Procédé de réalisation d'un plancher de filtre pour le traitement des eaux comportant une structure (10) constituée de poutres ou de poteaux supportant une dalle (9) pourvue d'une pluralité d'orifices destinés à recevoir des crépines (11) caractérisé en ce que l'on réalise le coulage du béton de ladite structure et de la dalle directement dans le cuvelage du filtre, la conformation de ladite structure et de la partie inférieure de la dalle étant obtenue par un seul et unique modèle de coffrage perdu (4).1 - Method for producing a filter floor for water treatment comprising a structure (10) consisting of beams or posts supporting a slab (9) provided with a plurality of orifices intended to receive strainers (11) characterized in that the concrete is poured from said structure and from the slab directly into the casing of the filter, the conformation of said structure and of the lower part of the slab being obtained by a single lost formwork model (4).
2 - Procédé selon la revendication 1 caractérisé en ce que le coulage de la structure de support (10) et de la dalle (9) est réalisé en une seule étape.2 - Method according to claim 1 characterized in that the casting of the support structure (10) and the slab (9) is carried out in a single step.
3 - Procédé selon la revendication 1 caractérisé en ce que le coulage de la structure de support (10) et de la dalle (9 est réalisé en deux étapes.3 - Method according to claim 1 characterized in that the casting of the support structure (10) and the slab (9 is carried out in two stages.
4 - Procédé selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte les étapes successives suivantes :4 - Method according to any one of the preceding claims, characterized in that it comprises the following successive steps:
- réalisation du cuvelage (1) du filtre,- realization of the casing (1) of the filter,
- mise en place des ferraillages (6) des poutres ou poteaux de la structure de support du filtre ;- installation of reinforcements (6) of the beams or posts of the filter support structure;
- positionnement et fixation des coffrages perdus (4) ; - montage de bagues (7) protégées par des capuchons, sur les coffrages perdus aux emplacements prévus pour les crépines ;- positioning and fixing of lost formwork (4); - mounting of rings (7) protected by caps, on the lost formwork in the locations provided for the strainers;
- réalisation du ferraillage (8) de la partie supérieure de la dalle (9);- realization of the reinforcement (8) of the upper part of the slab (9);
- coulage du béton de la structure de support (10) et de la dalle (9),- pouring the concrete of the support structure (10) and the slab (9),
- enlèvement des capuchons protégeant les bagues et montage des crépines (11) sur lesdites bagues- removal of the caps protecting the rings and mounting of the strainers (11) on said rings
5 - Coffrage perdu pour la mise en oeuvre d'un procédé selon l'une quelconque des revendications précédentes caractérisé en ce qu'il est réalisé en un matériau choisi dans le groupe comprenant les matières plastiques, l'acier et les matériaux composites.5 - Formwork lost for the implementation of a process according to any one of the preceding claims, characterized in that it is made of a material chosen from the group comprising plastics, steel and composite materials.
6 - Coffrage selon la revendication 5 caractérisé en ce que l'épaisseur dudit coffrage perdu (4) est comprise entre 1 et 15 mm, de préférence entre 3 et 7 mm.6 - Formwork according to claim 5 characterized in that the thickness of said lost formwork (4) is between 1 and 15 mm, preferably between 3 and 7 mm.
7 - Coffrage selon l'une quelconque des revendications 5 et 6 caractérisé en ce que sa hauteur est comprise entre 100 et 700 mm, de préférence entre 120 et 250 mm7 - Formwork according to any one of claims 5 and 6 characterized in that its height is between 100 and 700 mm, preferably between 120 and 250 mm
8 - Coffrage selon l'une quelconque des revendications 5 à 7 caractérisé en ce que sa largeur est comprise entre 300 et 1 300 mm, de préférence entre 450 et 700 mm.8 - Formwork according to any one of claims 5 to 7 characterized in that its width is between 300 and 1,300 mm, preferably between 450 and 700 mm.
9 - Coffrage selon l'une quelconque des revendications 5 à 8 caractérisé en ce que sa longueur est comprise entre 2 et 7 m.9 - Formwork according to any one of claims 5 to 8 characterized in that its length is between 2 and 7 m.
10 - Coffrage selon l'une quelconque des revendications 5 à 9 caractérisé en ce que sa géométrie est définie de manière que les pressions exercées sur ses parois latérales lors du coulage du béton créent une contre-flèche en partie supérieure dudit coffrage qui compense, au moins partiellement la flèche occasionnée par le poids du béton. 11 - Coffrage selon l'une quelconque des revendications 5 à 10 caractérisé en ce que la forme de ses parois est définie de manière à minimiser les pertes de charge du fluide circulant à l'intérieur du filtre.10 - Formwork according to any one of claims 5 to 9 characterized in that its geometry is defined so that the pressures exerted on its side walls during the pouring of the concrete create a jib at the top of said formwork which compensates, at less partially the deflection caused by the weight of the concrete. 11 - Formwork according to any one of claims 5 to 10 characterized in that the shape of its walls is defined so as to minimize the pressure losses of the fluid flowing inside the filter.
12 - Coffrage selon la revendication 11 caractérisé en ce que ses parois sont pourvues de nervures (15, 15') assurant la rigidité de ses pians horizontaux et verticaux12 - Formwork according to claim 11 characterized in that its walls are provided with ribs (15, 15 ') ensuring the rigidity of its horizontal and vertical planes
13 - Coffrage selon l'une quelconque des revendications 5 à 12 caractérisé en ce que ses parois latérales présentent une forte courbure .13 - Formwork according to any one of claims 5 to 12 characterized in that its side walls have a strong curvature.
14 - Coffrage selon l'une quelconque des revendications 5 à 13 caractérisé en ce qu'il comporte en partie latérale des orifices (13) et (14) et en partie supérieure une pluralité d'orifices (16) destinés à recevoir les bagues (7) sur lesquelles viennent se fixer les crépines de filtre et en partie inférieure des trous de fixation (17) en vue de sa soiidarisation avec le radier du filtre.14 - Formwork according to any one of claims 5 to 13 characterized in that it comprises in the lateral part of the orifices (13) and (14) and in the upper part a plurality of orifices (16) intended to receive the rings ( 7) on which the filter screens are fixed and in the lower part of the fixing holes (17) for its separation with the filter base.
15 - Filtre pour le traitement des eaux caractérisé en ce qu'il comporte un plancher réalisé conformément au procédé spécifié dans l'une quelconque des revendications 1 à 4 en mettant en oeuvre un coffrage perdi' selon l'une quelconque des revendications 5 à 14. 15 - Filter for water treatment characterized in that it comprises a floor produced in accordance with the process specified in any one of claims 1 to 4 by using a lost formwork 'according to any one of claims 5 to 14 .
EP98904230A 1997-02-19 1998-01-27 Method for producing a filter bottom for water treatment Expired - Lifetime EP0961648B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9701963 1997-02-19
FR9701963A FR2759720B1 (en) 1997-02-19 1997-02-19 PROCESS FOR PRODUCING A FILTER FLOOR FOR WATER TREATMENT
PCT/FR1998/000146 WO1998036816A1 (en) 1997-02-19 1998-01-27 Method for producing a filter bottom for water treatment

Publications (2)

Publication Number Publication Date
EP0961648A1 true EP0961648A1 (en) 1999-12-08
EP0961648B1 EP0961648B1 (en) 2003-04-09

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EP98904230A Expired - Lifetime EP0961648B1 (en) 1997-02-19 1998-01-27 Method for producing a filter bottom for water treatment

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US (1) US6409944B1 (en)
EP (1) EP0961648B1 (en)
KR (1) KR100506564B1 (en)
CN (1) CN1163291C (en)
AR (1) AR011843A1 (en)
AT (1) ATE236695T1 (en)
AU (1) AU6218998A (en)
BR (1) BR9807235A (en)
CA (1) CA2281615C (en)
DE (2) DE69813187T2 (en)
DK (1) DK0961648T3 (en)
EA (1) EA000911B1 (en)
ES (1) ES2138577T3 (en)
FR (1) FR2759720B1 (en)
GR (1) GR990300045T1 (en)
ID (1) ID22709A (en)
IL (1) IL130958A (en)
NO (1) NO319720B1 (en)
PL (1) PL197484B1 (en)
PT (1) PT961648E (en)
TR (1) TR199901871T2 (en)
WO (1) WO1998036816A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6569328B1 (en) * 2000-11-02 2003-05-27 Gary D. Haggard Underdrain filtration system with stamped perforations
EP3539569A1 (en) * 2002-12-24 2019-09-18 Rinat Neuroscience Corp. Anti-ngf antibodies and methods using the same in treating pain associated with musculo-skeletal disorders
KR101114856B1 (en) 2010-04-02 2012-02-14 주식회사 거성개발 Method for producing a strainer block for water purification plant and strainer block produced thereby
US9884295B2 (en) 2012-10-08 2018-02-06 Doosan Heavy Industries & Construction Co., Ltd. Membrane bioreactor system using reciprocating membrane
US9422168B2 (en) 2013-04-24 2016-08-23 Doosan Heavy Industries & Construction Co., Ltd. Dissolved air flotation device for liquid clarification
CN104436777B (en) * 2014-12-26 2016-08-24 贵州师范大学 Integral type cement pours slow filter

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US1183594A (en) * 1908-07-29 1916-05-16 Roy H Robinson Method of forming composite floor construction.
BE498884A (en) * 1949-10-25
US3110667A (en) * 1959-10-16 1963-11-12 Leopold Co Inc F B Filter bottom
US3456804A (en) * 1966-10-26 1969-07-22 M C G Corp Filter bottoms
FR2625915B1 (en) * 1988-01-15 1990-05-25 Degremont PROCESS FOR THE MANUFACTURE OF FLOORS FOR FILTERS, AND FLOORS THUS PRODUCED
FR2641588B1 (en) * 1989-01-09 1991-03-22 Degremont DEVICE FOR THE PLACEMENT AND FIXATION, ON THE FLOOR OF A FILTER, OF BODIES PROVIDING THE TRANSIT OF FLUIDS THROUGH THE FLOOR

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Title
See references of WO9836816A1 *

Also Published As

Publication number Publication date
DE69813187T2 (en) 2004-02-12
FR2759720A1 (en) 1998-08-21
US6409944B1 (en) 2002-06-25
ATE236695T1 (en) 2003-04-15
KR20000071201A (en) 2000-11-25
CA2281615A1 (en) 1998-08-27
AU6218998A (en) 1998-09-09
TR199901871T2 (en) 1999-12-21
ID22709A (en) 1999-12-09
IL130958A0 (en) 2001-01-28
BR9807235A (en) 2000-04-25
CN1163291C (en) 2004-08-25
DK0961648T3 (en) 2003-04-28
EP0961648B1 (en) 2003-04-09
IL130958A (en) 2002-08-14
AR011843A1 (en) 2000-09-13
EA000911B1 (en) 2000-06-26
WO1998036816A1 (en) 1998-08-27
NO993989D0 (en) 1999-08-18
FR2759720B1 (en) 1999-04-30
DE69813187D1 (en) 2003-05-15
DE961648T1 (en) 2000-04-20
CN1248174A (en) 2000-03-22
NO993989L (en) 1999-10-18
CA2281615C (en) 2006-10-24
KR100506564B1 (en) 2005-08-10
PL197484B1 (en) 2008-04-30
PT961648E (en) 2003-08-29
ES2138577T3 (en) 2003-11-01
NO319720B1 (en) 2005-09-05
ES2138577T1 (en) 2000-01-16
GR990300045T1 (en) 2000-01-31
PL335105A1 (en) 2000-04-10
EA199900748A1 (en) 2000-04-24

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